public ActionResult AddPaymentByStudent(int?id)
{
if (id == null)
{
return(new HttpStatusCodeResult(HttpStatusCode.BadRequest));
}
var student = _studentBl.GetStudentById(id);
if (student == null)
{
throw new ArgumentNullException(nameof(student));
}
ViewBag.GradeId = new SelectList(_gradeBl.GetGrades(), "Id", "ClassName", student.GradeId);
ViewBag.StudentId = new SelectList(_studentBl.GetStudentInfos(), "Id", "Name", student.Id);
return(View());
}
